从 MYSQL 数据库中检索后，PHP 中的哈希密码不是字符串 [英] Hash Password in PHP not a string after retrieval from MYSQL database

问题描述

我有登录部分的密码，它使用 $hash = password_hash($password, PASSWORD_DEFAULT);

I have the password for the login part, which uses $hash = password_hash($password, PASSWORD_DEFAULT);

密码以散列形式存储在数据库中，$2y$10$CaQON5WOEHcla58aBoIRKOmyYLBwtDHKFqk81y25.EGvjBqlF0W1W

The password is stored in the database as a hash, $2y$10$CaQON5WOEHcla58aBoIRKOmyYLBwtDHKFqk81y25.EGvjBqlF0W1W

我在登录页面上查询数据库并检查用户电子邮件是否在数据库中.

I query the database on the login page and check that the user email is in the database, which it is.

如果我使用的查询有效，我已经检查了 MySQL 工作台，它返回的密码很好.

I have checked in MySQL workbench if the query I used works, and it returns the password fine.

但是，当我尝试在数据库中查询密码并将其分配给变量时，在回显变量不是字符串时出现错误.

However, when I try to query the database for the password and assign it to a variable, I get an error when echoing that the variable is not a string.

我试过 $verify = password_verify($password, $hash); 但是，我也得到的错误是参数 2 必须是一个字符串.

I've tried $verify = password_verify($password, $hash); however, the error I also get is parameter 2 must be a string.

那么为什么我得到后该值不是字符串呢?以及如何检索正确的值?

So why is the value not a string after I get it? and how do I retrieve the correct value?

这是我的查询:

   $sql_e2 = "SELECT password FROM users WHERE email='$email'";
   $hash = mysqli_query($mysqli, $sql_e2);

谢谢

推荐答案

我完成了现在工作和测试的工作&非工作帐户.

I finished putting together what is now working and tested against working & non working accounts.

//query SQL for password
        $sql_e2 = $mysqli->prepare("SELECT password FROM users WHERE email = ?");
        $sql_e2->bind_param("s", $email);
        $sql_e2->execute();
        $result = $sql_e2->get_result();

        //fetch row from result and assign value
        $row = mysqli_fetch_row($result);
        $hash = $row[0] ?? false;

        // Print the result depending if they match
        if (password_verify($password, $hash)) {
            echo 'Password Verified!';
        } else {
            echo 'Incorrect Password!';
        }

谢谢各位指点.

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